I recently watched this video, and found it kind of interesting. https://www.youtube.com/watch?v=kdei5i5AczU A GC straight woman argues that she thinks it comes from a place of frustration with the power dynamics of heterosexuality, and wanting the perceived egalitarianism of same-sex relationships. Except they're actually straight, and so real same-sex relationships aren't an option for them.

I'm not sure how much I agree with everything she says, but since this is a straight woman analyzing the behavior of other straight women, I do think she has some added insight there.

Heterosexual women identifying as queer or non-binary is an attempt to, in a way, mimic homosexual relationships and throw off those gendered expectations.